Article
Chemistry, Multidisciplinary
Jaekyoung Kim, Yerin Ryu, Chi Hyung Kim, Seong Gil Heo, Kee-Youn Yoo, Hyunsik Yoon
Summary: This study proposes a simple method to obtain micro-hyperbola structures through wetting a photocurable viscous liquid around micropillars, demonstrating robust omniphobicity. The formation of hyperbola structures depends on the spacing ratio between micropillars, and the formation mechanism can be explained with a simple model.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Engineering, Environmental
Do Hoon Kim, Hee Ju An, Jae-Min Myoung
Summary: This article introduces a new method for fabricating micro-light-emitting diode (LED) pixel arrays using capillary force lithography, achieving a 10 μm-scale CsPbBrxI3-x micropattern array. The micro-PeLEDs fabricated demonstrated high luminance and external quantum efficiency.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Jong Seob Choi, Jonathan H. Tsui, Fei Xu, Su Han Lee, Sang-Keun Sung, Heon Joon Lee, Chao Wang, Hyung Jin Kim, Deok-Ho Kim
Summary: By adjusting parameters such as swelling time, Nafion polymer concentration, and curing temperature, the structural fidelity and mechanical properties of micro- and nanopatterned Nafion thin films can be modulated. Additionally, the impedance properties of these films are influenced by Nafion polymer concentration and curing temperature, with specific changes observed at different frequencies.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Metallurgy & Metallurgical Engineering
Xiping Yang, Yonghong Fu, Jinghu Ji, Xin Kuang
Summary: The study establishes a laser micro-melting model, taking into account the effects of boundary heat transfer, recoil pressure, surface tension, capillary force, and thermal capillary force on micro-flow. It reveals that the height variation of the morphology bulge is mainly caused by recoil pressure and capillary force. It shows that in the heating stage, molten metal flow is dominated by capillary force and thermal capillary force, while in the cooling stage, the capillary force is the main driving force for metal flow, gradually converging from both sides to the middle.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2022)
Article
Thermodynamics
Qifan Li, Zhong Lan, Jiang Chun, Shijun Lian, Rongfu Wen, Xuehu Ma
Summary: A novel micro-grooved wick with multi-scale structures was fabricated and its capillary performance investigated, showing that microstructure features had minimal effect on permeability and composite wick covered by microcavities exhibited superior capillary pumping amount and wicking velocity. In the comprehensive evaluation, the optimized capillary wick with microcavities showed over 260% improvement in capillary performance compared to plain sintered-powder wicks.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Analytical
Zenghua Fan, Zixiao Liu, Congcong Huang, Wei Zhang, Zhe Lv, Lefeng Wang
Summary: This study investigates capillary bridges and forces between spherical concave grippers and spherical particles. The analysis includes parameters such as contact angle, radius ratio, and liquid bridge volume to discuss the influence on dimensionless capillary force. The effectiveness of the theoretical approach is verified through simulation models and experiments.
Article
Nanoscience & Nanotechnology
Janis Snikeris, Vjaceslavs Gerbreders, Andrejs Bulanovs, Eriks Sledevskis
Summary: Metallic nanostructures have the ability to absorb or emit light at specific frequencies, and their growth can be promoted by irradiation from a focused electron beam. This study investigates the effects of various irradiation parameters on the size and shape of nanostructures on a silver surface, as well as the impact of vacuum chamber cleaning. The findings provide insights for controlling and optimizing the growth of nanostructures on metal surfaces.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Wenqiang Xing, Dengying Zhang, Lichun Zhang, Shuyi Zhang, Yupeng Huang, Jinxiu Li, Anqi Guo, Weiren Li, Fengzhou Zhao
Summary: In this study, replicas with resolution doubling were successfully fabricated using capillary force lithography. By studying masters of various characteristic sizes and utilizing thin films with thickness ranging from 50 nm to 100 nm for DVD masters, it was found that this method breaks the one-to-one replication rule and exhibits excellent reproducibility and stability.
Article
Chemistry, Multidisciplinary
K. P. Sonu, Le Zhou, Santidan Biswas, John Klier, Anna C. Balazs, Todd Emrick, Shelly R. Peyton
Summary: Hydrogels are water-swollen networks that have various applications in biomaterials and biotechnology. This study successfully synthesized multifunctional polymers to create hydrogels with reversible and irreversible cross-links. These strain-stiffening hydrogels have potential applications as biomaterials, particularly in emerging fields like tissue engineering.
Article
Chemistry, Physical
Im-Nam Jang, Yong-Sik Ahn
Summary: The porosity, permeability, and capillary force of porous sintered copper were studied in relation to copper powder size, pore-forming agent, and sintering conditions. Higher values of porosity and permeability were observed when the copper powder size was uniform or small. The capillary force increased with the addition of more forming agent and was higher with larger and non-uniform copper powder size. The results were discussed in relation to porosity and pore size distribution.
Article
Engineering, Environmental
Qin Zhang, Guo-Rui Zhu, Xiang-Xin Xiao, Qing-Song Liu, Min Jiang, De-Ming Guo, Hai-Bo Zhao, Wen-Da Li, Li Chen, Bo-Wen Liu, Yu-Zhong Wang
Summary: Constructing micro cross-linking structures into molecular chains improves basic properties of thermoplastic polymers. However, this method has limitations in improving polymer functionality. In this study, a multifunctional micro cross-linking network was reported, enhancing not only mechanical strength but also flame retardancy, dielectric properties, battery performance, antistatic properties, etc. A novel phosphinamide-containing monomer was synthesized and copolymerized into the polymer chain, resulting in improved tensile strength and flame retardancy, as well as various other desirable properties.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Hanheng Du, Mengnan Jiang, Zuankai Wang, Zhiwei Zhu, Suet To
Summary: This study proposed a machining process to generate micro/nanostructures on magnesium alloy surfaces. The study successfully generated various microstructures and sawtooth-shaped nanostructures on the surfaces, demonstrating the effectiveness of the proposed process.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Multidisciplinary
Younghun Shin, Subin Jeong, Kwon-Yeong Lee, Seeun Woo, Woonbong Hwang
Summary: Condensation is a critical phenomenon in industrial fields, and the condensation heat transfer performance can be improved by regulating the surface topology. This study analyzed the condensation phenomenon of large-area copper tubes and found a correlation between contact angle hysteresis and total heat transfer coefficient.
Review
Chemistry, Multidisciplinary
Yuan-Qiu-Qiang Yi, Wenming Su
Summary: This article introduces the recent progress of cross-linking strategies used in quantum-dot light-emitting diodes (QD-LEDs) to address the challenges in high-resolution display panel manufacturing process.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Allergy
Amene Tesfaye, Alba Rodriguez-Nogales, Sara Benede, Tahia D. Fernandez, Juan L. Paris, Maria J. Rodriguez, Isabel M. Jimenez-Sanchez, Gador Bogas, Cristobalina Mayorga, Maria J. Torres, Maria I. Montanez
Summary: This study identified the optimal structural requirement for specific cellular degranulation to AX using precise nanoarchitectures of different lengths. Longer nanostructures with spacers in the range of PEG 6000-12,000 Da showed dose-dependent activation responses in both cellular assays, indicating the importance of adduct size in promoting effector cell activation in AX allergy and potential impact on improving in vitro diagnostics.
Article
Materials Science, Multidisciplinary
Jiayi Yang, Ki Yoon Kwon, Shreyas Kanetkar, Ruizhe Xing, Praneshnandan Nithyanandam, Yang Li, Woojin Jung, Wei Gong, Mary Tuman, Qingchen Shen, Meixiang Wang, Tushar Ghosh, Kony Chatterjee, Xinxin Wang, Dongguang Zhang, Tae-il Kim, Vi Khanh Truong, Michael D. Dickey
Summary: The research presents a soft capacitive pressure sensor based on a bilayer of liquid metal elastomer foam (B-LMEF), which has high sensitivity and a large dynamic range, allowing it to operate over a wide range of stress levels.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Nanoscience & Nanotechnology
Jong Uk Kim, Hyejin Park, Jehyung Ok, Juheon Lee, Woojin Jung, Jiwon Kim, Jaehyun Kim, Suhyeon Kim, Yong Ho Kim, Minah Suh, Tae-il Kim
Summary: The study introduced a CSF-philic PDMS window coated with PVA, which effectively reduces bubble trapping, enhances biocompatibility, and maintains long-term optical clarity of cranial windows. Experimental results demonstrate minimal damage to neuronal tissues and attenuated immune response with this window.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Sanghun Lee, Junggeon Park, Semin Kim, Jehyung Ok, Jung Il Yoo, Yong Sook Kim, Youngkeun Ahn, Tae-il Kim, Heung Cho Ko, Jae Young Lee
Summary: This study investigates the effects of surface topography on the response of macrophages to implantable bioelectrodes. Heparin-doped polypyrrole (PPy/Hep) electrodes with different surface roughness were produced, and it was found that macrophages preferentially polarize to noninflammatory phenotypes on rough PPy/Hep electrodes. In vivo implantation experiments demonstrated that PPy/Hep-900 electrodes significantly reduce macrophage recruitment, suppress inflammatory polarization, and mitigate fibrotic tissue formation. In addition, the implanted PPy/Hep-900 electrodes can successfully record electrocardiographic signals for up to 10 days without substantial decreases in sensitivity.
Article
Multidisciplinary Sciences
Byeonghak Park, Joo Hwan Shin, Jehyung Ok, Subin Park, Woojin Jung, Chanho Jeong, Seunghwan Choy, Young Jin Jo, Tae-il Kim
Summary: This study introduces a novel hydrogel material for removing artifacts in bioelectronic signals from patients. The hydrogel exhibits frequency-dependent phase transition, damping low-frequency noise and transmitting desired high-frequency signals.
Article
Engineering, Electrical & Electronic
Yei Hwan Jung, Jae-Young Yoo, Abraham Vazquez-Guardado, Jae-Hwan Kim, Jin-Tae Kim, Haiwen Luan, Minsu Park, Jaeman Lim, Hee-Sup Shin, Chun-Ju Su, Robert Schloen, Jacob Trueb, Raudel Avila, Jan-Kai Chang, Da Som Yang, Yoonseok Park, Hanjun Ryu, Hong-Joon Yoon, Geumbee Lee, Hyoyeong Jeong, Jong Uk Kim, Aadeel Akhtar, Jesse Cornman, Tae-il Kim, Yonggang Huang, John A. Rogers
Summary: This technology allows for the transmission of vibro-tactile patterns on the skin to convey navigation instructions, translate music into tactile patterns, and provide sensory feedback for robotic prosthetics. The system is lightweight and flexible, offering full-body coverage for tactile sensations.
NATURE ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Junsung Bang, Junhyuk Ahn, Jinyuan Zhang, Tae Hee Ko, Byeonghak Park, Yong Min Lee, Byung Ku Jung, Sang Yeop Lee, Jehyung Ok, Bong Hoon Kim, Tae-il Kim, Jong-Il Choi, Chi Hwan Lee, Soong Ju Oh
Summary: This study presents the development of a new type of stretchable electrode with complete coverage and enhanced charge-extraction efficiency. The electrode, composed of double layers, achieves improved interface bonding and mechanical properties through chemical treatment and reinforced nanowire-embedded metal thin films. This electrode exhibits superior performance in capturing signals and has significant implications for the development of wearable electronics.
Review
Pharmacology & Pharmacy
Ju Seung Lee, Jiwon Kim, Yeong-sinn Ye, Tae-il Kim
Summary: Phototherapy has emerged as a promising solution for cancer treatment due to its multifunctionality and minimal invasiveness. This review focuses on diverse optical electronics and phototherapy methods, including photo-thermal therapy, photo-activated chemotherapy, and photo-dynamic therapy. The introduction of a drug delivery system that can deliver photopharmaceutical agents to the tumor site is also discussed. The article provides an overview of materials and devices for phototherapy and addresses critical issues and limitations.
ADVANCED DRUG DELIVERY REVIEWS
(2022)
Correction
Chemistry, Multidisciplinary
Woojin Jung, Gyan Raj Koirala, Ju Seung Lee, Jong Uk Kim, Byeonghak Park, Young Jin Jo, Chanho Jeong, Haeleen Hong, Kiyoon Kwon, Yeong-sinn Ye, Jiwon Kim, Kanghyuk Lee, Tae-il Kim
Article
Chemistry, Multidisciplinary
Hyesu Choi, Yichi Luo, Gina Olson, Phillip Won, Joo Hwan Shin, Jehyung Ok, Ye Ji Yang, Tae-il Kim, Carmel Majidi
Summary: Kirigami, a traditional paper-cutting art, is used to create mechanically robust circuitry for stretchable devices through structural deformation. This study introduces Liquid Metal based Elastic Kirigami Electrodes (LM-eKE) with eutectic gallium-indium (EGaIn) coating, which can be stretched to 820% strain with only a 33% increase in electrical resistance. The LM-eKE maintains high electrical conductivity even during extreme deformation, allowing for stable electrical operation of wearable health monitoring devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Jehyung Ok, Sumin Park, Yei Hwan Jung, Tae-il Kim
Summary: Wearable and implantable electronic devices have been developed to continuously monitor and analyze the concentration of cortisol, a hormone released in response to stress. These devices provide wireless real-time analysis, overcoming the limitations of traditional cortisol measurement methods. This technology holds great potential for stress monitoring and management.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ju Seung Lee, Jiwoong Choi, Gha Yeon Park, Seung Ji Kang, Jae-hun Yang, Youngkyu Lee, Myunghwan Choi, Kwangmeyung Kim, Tae-il Kim
Summary: The development of fabrication technologies and new materials has significantly improved the performance of electronic devices while reducing their overall size. However, micro/nano-size electronic devices have faced issues related to isolated heat generation in concentrated areas, especially in bio-integrated devices. To address this problem, a microscale light emitting diode (mu LED)-based neural probe with an injectable heat dissipation guide made of boron nitride (BN) nanomaterials is introduced. This heat dissipation guide effectively dissipates heat, leading to improved optical output performance of mu LEDs and enhanced lighting transmission through brain tissue without thermal damage. Additionally, it shows remarkable improvement in the therapeutic effect of photodynamic therapy in mouse cancer cells.
Article
Materials Science, Multidisciplinary
Jiayi Yang, Praneshnandan Nithyanandam, Shreyas Kanetkar, Ki Yoon Kwon, Jinwoo Ma, Sooik Im, Ji-Hyun Oh, Mohammad Shamsi, Mike Wilkins, Michael Daniele, Tae-il Kim, Huu Ngoc Nguyen, Vi Khanh Truong, Michael D. Dickey
Summary: Conductive textiles can be created by coating fabric with liquid metal particles, which provides possibilities for human-machine interfaces and wearable electronics. In this method, the fabric is dipped into a suspension of liquid metal particles at room temperature. The coated fabric remains electrically insulating due to the native oxide on the particles, but can become conductive by compressing it to rupture the oxide and allow particle percolation. Conductive circuits can be patterned on the textile by compressing it with a patterned mold. The electrical conductivity of these circuits can be improved by increasing the particle coating. The LM-coated textiles also possess antimicrobial protection against Pseudomonas aeruginosa and Staphylococcus aureus, and the conductive patterns autonomously heal when cut.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Biomedical
Wei Ouyang, Wei Lu, Yamin Zhang, Yiming Liu, Jong Uk Kim, Haixu Shen, Yunyun Wu, Haiwen Luan, Keith Kilner, Stephen P. Lee, Yinsheng Lu, Yiyuan Yang, Jin Wang, Yongjoon Yu, Amy J. Wegener, Justin A. Moreno, Zhaoqian Xie, Yixin Wu, Sang Min Won, Kyeongha Kwon, Changsheng Wu, Wubin Bai, Hexia Guo, Tzu-li Liu, Hedan Bai, Giuditta Monti, Jason Zhu, Surabhi R. Madhvapathy, Jacob Trueb, Maria Stanslaski, Elizabeth M. Higbee-Dempsey, Iwona Stepien, Nayereh Ghoreishi-Haack, Chad R. Haney, Tae-il Kim, Yonggang Huang, Roozbeh Ghaffari, Anthony R. Banks, Thomas C. Jhou, Cameron H. Good, John A. Rogers
Summary: This article describes a tether-less and battery-less implant that can record electroencephalograms, electromyograms and body temperature in freely moving small animals, as well as perform closed-loop neuromodulation via optogenetics and pharmacology. The wireless and battery-less technology allows for studies that require the use of unconstrained animals and eliminates the limitations of physical tethers and batteries. The implant has a system-on-a-chip with Bluetooth Low Energy for data transmission and a compressed deep-learning module for autonomous operation.
NATURE BIOMEDICAL ENGINEERING
(2023)
Article
Engineering, Biomedical
Kyeongha Kwon, Jong Uk Kim, Sang Min Won, Jianzhong Zhao, Raudel Avila, Heling Wang, Keum San Chun, Hokyung Jang, Kun Hyuck Lee, Jae-Hwan Kim, Seonggwang Yoo, Youn J. Kang, Joohee Kim, Jaeman Lim, Yoonseok Park, Wei Lu, Tae-il Kim, Anthony Banks, Yonggang Huang, John A. Rogers
Summary: Devices for monitoring blood haemodynamics can guide the perioperative management of patients with cardiovascular disease. In this study, an integrated wireless sensor capable of measuring pressure, flow rate and temperature simultaneously and in real time was developed. The device showed comparable performance to clinical tools in large animal models, providing the potential for continuous monitoring of blood haemodynamics in patients.
NATURE BIOMEDICAL ENGINEERING
(2023)
Review
Chemistry, Multidisciplinary
Onuralp Karatum, Min-Jun Gwak, Junghun Hyun, Asim Onal, Gyan Raj Koirala, Tae-il Kim, Sedat Nizamoglu
Summary: Light-based neuromodulation systems provide high-resolution communication with neurons without physical tether. These systems, ranging from nano to centimeter scales, enable control of neural activity in various organs and contexts. Nanotransducers and microphotodiodes convert light into electrical, thermal, and mechanical stimuli, allowing remote and non-contact stimulation of neurons. Integrated devices composed of nano and microscale optoelectronic components enable multimodal and closed-loop optogenetic neuromodulation.
CHEMICAL SOCIETY REVIEWS
(2023)
